Liwei Zeng

ORCID: 0000-0002-3197-8285
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About
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Research Areas
  • Dental Health and Care Utilization
  • Coding theory and cryptography
  • Oral microbiology and periodontitis research
  • graph theory and CDMA systems
  • Vehicle Routing Optimization Methods
  • Finite Group Theory Research
  • Dental materials and restorations
  • Point processes and geometric inequalities
  • Pediatric health and respiratory diseases
  • Advanced Graph Theory Research
  • Autoimmune and Inflammatory Disorders Research
  • Parvovirus B19 Infection Studies
  • Optimization and Search Problems
  • Computational Geometry and Mesh Generation
  • Orthodontics and Dentofacial Orthopedics
  • Dental Implant Techniques and Outcomes
  • Cryptographic Implementations and Security
  • Matrix Theory and Algorithms
  • Immune Cell Function and Interaction
  • Dental Radiography and Imaging
  • HIV/AIDS oral health manifestations
  • Endodontics and Root Canal Treatments
  • Scheduling and Timetabling Solutions
  • Cardiovascular Health and Risk Factors
  • Nutrition and Health in Aging

Guangzhou University of Chinese Medicine
2025

Hebei Normal University
2010-2024

Guangdong Province Women and Children Hospital
2023-2024

Nanchang University
2013-2022

University of Minnesota
2022

Northwestern University
2017-2019

Management Sciences (United States)
2019

Peking University
2013

Cyclic codes with two zeros and their dual have been a subject of study for many years. However, weight distributions are known only few cases. In this paper, the duals cyclic settled more

10.1109/tit.2011.2165314 article EN IEEE Transactions on Information Theory 2011-09-16

Cyclic codes with two zeros and their dual have been a subject of study for many years. However, weight distributions are known only few cases. In this paper, the duals cyclic settled The punctured versions these also determined several special

10.1109/tit.2010.2090272 article EN IEEE Transactions on Information Theory 2010-12-29

Purpose Adult body shape index (ABSI) is widely recognized as a reliable indicator for evaluating fat distribution and dysfunction. However, the relationship between ABSI Klotho protein, known its anti-aging biological function, has not yet been investigated. Therefore, aim of this study was to assess correlation serum levels in adults residing United States. Methods A cross-sectional participants conducted based on 2007–2016 National Health Nutrition Examination Survey. Visceral adiposity...

10.3389/fendo.2025.1424350 article EN cc-by Frontiers in Endocrinology 2025-02-11

10.1016/j.ffa.2025.102625 article EN Finite Fields and Their Applications 2025-04-10

The purpose of this study was to investigate the status caries in deciduous teeth and effect diet lifestyle habits on dental among 3- 5-year-old preschool children Jiangxi Province, China. In total, 2880 cases involving were selected by stratified cluster sampling. examination methods criteria followed WHO guidelines. SPSS 19.0 used for statistical analysis. Chi square tests compare prevalence with different social characteristics. Non-parametric decayed, missing filled (dmft) index values....

10.1186/s12903-018-0686-0 article EN cc-by BMC Oral Health 2018-12-01

Abstract Background This study aimed to examine the association between oral health behaviors and tooth retention among Chinese older adults. Methods Data were used from 4th National Oral Health Survey, a nationally representative sample. The sample included 9054 adults aged 55 74. Control variables measured through questionnaire interview, number of remaining teeth periodontal obtained an examination. A chi-square test was for univariate analysis. Multivariate Logistic regression explore...

10.1186/s12903-022-02283-2 article EN cc-by BMC Oral Health 2022-07-14

Abstract Background The purpose of this survey was to examine the association general characteristics, oral health knowledge, attitudes, behavior, and dental caries status among adolescents in Jiangxi Province provide a basis for future prevention middle school students. Methods A total 8,160 aged 12 15 years were invited participate by stratified random cluster sampling method from 30 schools five counties Province. self‐administered questionnaire used understand their basic including...

10.1111/jphd.12371 article EN Journal of Public Health Dentistry 2020-08-17

This paper proposes a new formulation for the school bus scheduling problem (SBSP), which optimizes start times and operation to minimize transportation cost. The goal is number of buses serve all routes such that each route arrives in time window before starts. We show introducing context-specific features, common many districts, can lead time-indexed integer linear programming (ILP) formulation. Based on strengthened version relaxation ILP, we develop dependent randomized rounding...

10.1287/trsc.2022.1130 article EN Transportation Science 2022-03-09

10.1016/j.disc.2015.09.002 article EN publisher-specific-oa Discrete Mathematics 2015-09-21

In this paper, we construct some [Formula: see text]-designs, which are also known as partial geometric designs, using totally isotropic subspaces of the unitary space. Furthermore, these text]-designs yield six infinite families directed strongly regular graphs.

10.1142/s1005386717000232 article EN Algebra Colloquium 2017-09-01

This paper introduces the covering path problem on a grid (CPPG) that finds cost-minimizing connecting subset of points in such each point needs to be covered is within predetermined distance from chosen subset. We leverage geometric properties graph, which captures road network structure many transportation problems, including our motivating setting school bus routing. As defined this paper, CPPG biobjective optimization comprising one cost term related length and stop count. develop...

10.1287/trsc.2019.0901 article EN Transportation Science 2019-10-23

Directed strongly regular graphs were introduced by Duval in 1998 as one of the possible generalization classical to directed case. also provided several construction methods for graphs. In this paper, an infinite family is constructed, generalized Cayley cyclic groups.

10.48550/arxiv.1410.1161 preprint EN other-oa arXiv (Cornell University) 2014-01-01

Abstract Objectives To explore and identify an optimal serum ferritin (SF) threshold level in diagnosing hemophagocytic lymphohistiocytosis (HLH) Chinese children. Methods We conducted a retrospective study of 74 children with HLH admitted to Guangdong Women Children Hospital between January 2015 May 2021. in-hospital not diagnosed 2021 measurement SF were enrolled as the non-HLH group. Patient charts reviewed for levels upon admission during hospitalization. A receiver operating...

10.1515/labmed-2024-0048 article EN cc-by Journal of Laboratory Medicine 2024-06-10

<p>In this paper, a symplectic fission scheme for the association of $ m\times n rectangular matrices over finite field \mathbb{F}_q $, denoted by {\rm{SMat}}(m\times n, q) is constructed, where q power prime number. We discuss its classes and inner automorphism group. In particular, we determine intersection numbers group m = 1 2 $.</p>

10.3934/math.20241570 article EN cc-by AIMS Mathematics 2024-01-01

Hemophagocytic lymphohistiocytosis (HLH) is a potentially life-threatening condition in children with sepsis. We herein aimed to identify clinical and laboratory predictors of HLH conducted retrospective study 568 sepsis admitted Guangdong Women Children Hospital from January 2019 June 2022. HLH, while rare (6.34%), proved be highly fatal complication (37.14%) had higher levels aspartate aminotransferase, lactate dehydrogenase, triglycerides, ferritin than without HLH; conversely, they...

10.1038/s41598-023-44628-z article EN cc-by Scientific Reports 2023-10-20

We study the following geometry problem: given a $2^n-1$ dimensional vector $\pi=\{\pi_S\}_{S\subseteq [n], S\ne \emptyset}$, is there an object $T\subseteq\mathbb{R}^n$ such that $\log(\mathrm{vol}(T_S))= \pi_S\,\,\forall S\subseteq [n]$, where $T_S$ projection of $T$ onto subspace spanned by axes in $S$ and $\mathrm{vol}(T_S)$ its $|S|$-dimensional volume? If $\pi$ does correspond to $\mathbb{R}^n$, we say constructible. use $\Psi_n$ denote constructible region, i.e., set all vectors...

10.1137/18m1184679 article EN SIAM Journal on Discrete Mathematics 2019-01-01

We provided baseline data for oral public health through epidemiological surveys to investigate the prevalence of malocclusion and orthodontic treatment proportion in 12- 14-year-old adolescents Jiangxi province, China.Multi-stage random cluster sampling was used. A total 5 387 were examined by three professional dentists according Angle's classification malocclusion. The subjects recruited from 30 secondary schools five counties Province. Results statistically analyzed SPSS19.0.The 79.67%...

10.7518/hxkq.2019.05.017 article EN PubMed 2019-10-01

This study aimed to investigate the oral health service needs and dental treatment among 3-year-old 5-year-old preschool children in Jiangxi province provide data support development of relevant policies, enhance utilization visit rate, optimize manpower resources.A total 2 880 were selected via stratified cluster sampling. Dental examination methods criteria according fourth national epidemiological survey adopted. Excel 2007 SPSS 19.0 softwares used for statistics analysis. Chi-square test...

10.7518/hxkq.2018.06.013 article EN PubMed 2018-12-01

We study the following geometry problem: given a $2^n-1$ dimensional vector $\pi=\{\pi_S\}_{S\subseteq [n], S\ne \emptyset}$, is there an object $T\subseteq\mathbb{R}^n$ such that $\log(\mathsf{vol}(T_S))= \pi_S$, for all $S\subseteq [n]$, where $T_S$ projection of $T$ to subspace spanned by axes in $S$? If $\pi$ does correspond $\mathbb{R}^n$, we say {\em constructible}. use $\Psi_n$ denote constructible region, i.e., set vectors $\mathbb{R}^{2^n-1}$. In 1995, Bollob\'{a}s and Thomason...

10.48550/arxiv.1410.8663 preprint EN other-oa arXiv (Cornell University) 2014-01-01

This paper introduces the covering path problem on a grid (CPPG) which finds cost-minimizing connecting subset of points in such that each point needs to be covered is within predetermined distance from chosen subset. We leverage geometric properties graph captures road network structure many transportation problems, including our motivating setting school bus routing. As defined this paper, CPPG bi-objective optimization comprised one cost term related length and stop count. develop...

10.48550/arxiv.1709.07485 preprint EN other-oa arXiv (Cornell University) 2017-01-01

Abstract Objective To study the prevalence of gum bleeding in children aged 12–15 years Jiangxi Province and related influencing factors for development effective prevention treatment strategies. Methods A multistage cluster stratified sampling method was used to select 8,160 this study. Enrolled completed a set survey questionnaires covering children's gender, age, parents' educational level, oral health knowledge scores, attitude brushing habits addition dental examination. All data were...

10.1111/jphd.12417 article EN Journal of Public Health Dentistry 2020-11-18

Abstract Background This study aimed to examine the association between oral health behaviors and tooth retention among Chinese older adults. Methods Data were used from 4th National Oral Health Survey, a nationally representative sample. The sample included 9054 adults aged 55 74. A chi-square test was for univariate analysis. Multivariate Logistic regression explore number of remaining teeth. Results average teeth in 24.4 ± 7.8. There higher proportion residents living urban areas with ≥...

10.21203/rs.3.rs-820638/v1 preprint EN cc-by Research Square (Research Square) 2021-08-23
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